TTFM 1.0 Transit Time Flowmeter
for Clean Liquids

• Non-Contacting Clamp-on Ultrasonic Transducers

• Works on Metal and Plastic Pipes from ½" to 48" (12 to 1200 mm)

• Large Backlit Flow Rate Display and Totalizer

• Isolated 4-20mA Output

• Built-in 5-Key Calibrator

• 2 Programmable Control Relays

• Optional 2 Million Point Data Logger

The TTFM 1.0 works on a wide range of pipe sizes from ½" to 48" (12 to 1200 mm) diameter and on common pipe materials including carbon steel, stainless steel, ductile iron, cast iron, PVC, PVDF, fiberglass, copper, brass, aluminum and pipes with bonded liners including epoxy, rubber and Teflon.

The TTFM 1.0 Transit Time Flowmeter operates by measuring the “transit time” or “time of flight” for ultrasonic sound pulses transmitted from one transducer to another. Depending on the mounting configuration, the signal may cross the pipe once, twice or four times. To measure flow the transit time is compared between ultrasonic signals travelling upstream and downstream.

• pair SE16B ultrasonic transducers - clamp-on for 1/2” to 48” (12 mm to 1200 mm) pipes
  and rated non-incendive for Class I, Division 2, Groups A, B, C & D locations
• sensor cables - pair 25 ft / 7.6 m coaxial with BNC connectors
• flow rate range: ± 0.07 to 39 ft/sec (± 0.02 to 12 m/sec)
• installation - stainless steel transducer mounting brackets and clamps, alignment bar and silicone coupling compound kit
• enclosure - watertight, NEMA4X (IP66) polyester and polycarbonate
• display - white, backlit matrix
• totalizer - 14 digits
• calibration - built-in 5-key programmer
• output - isolated 4-20mA (1000 ohm)
• 2 control relays - 5 amp, SPDT - programmable for flow proportional pulse output, and/or flow alarm
• plug-and-play options including data logger and extra control relays
• power input - 100-240VAC 50/60Hz, 4 Watts maximum
• electrical surge protection and RFI filters - AC, sensor, 4-20mA